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Minor earthquake 3.4 mag, 46 km WSW of Big Lake, Alaska


Earthquake location 61.4077S, -150.7914WA minor earthquake with magnitude 3.4 (ml/mb) was reported 46 kilometers (29 miles) from Big Lake in Alaska on Monday. The epicenter of the earthquake was roughly 51.6 km (32 miles) below the earth’s surface. Exact location of event, depth 51.6 km, -150.7914° West, 61.4077° North. Unique identifier: ak20273658. Ids that are associated to the event: ak20273658. Exact time and date of earthquake 08/10/18 / 2018-10-08 22:21:32 / October 8, 2018 @ 10:21 pm UTC/GMT. The temblor was picked up at 13:21:32 / 1:21 pm (local time epicenter).

Event epicenter was 52 km (32 miles) from Anchorage (c. 291 800 pop), 66 km (41 miles) from Eagle River (c. 24 800 pop), 64 km (40 miles) from Knik-Fairview (c. 14 900 pop), 82 km (51 miles) from Lakes (c. 8 400 pop), 76 km (47 miles) from Tanaina (c. 8 200 pop). Nearby country/countries that might be effected, United States (c. 310 233 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Lakes, Tanaina, Wasilla.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days six and in the last 365 days fifty-three earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. There are an estimated 130,000 minor earthquakes in the world each year.

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 46 km WSW of Big Lake, Alaska.

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More information

Parameter Value Description
Magnitude 3.4 mb The magnitude for the event.
Longitude -150.7914° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 61.4077° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 51.6 km Depth of the event in kilometers.
Place 46km WSW of Big Lake, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-10-08 22:21:32 Time when the event occurred. UTC/GMT
Updated 2018-10-08 22:28:51 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status automatic Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 178 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.68 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID ak20273658 Id of event.
Event Code 20273658 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak20273658, A comma-separated list of event ids that are associated to an event.

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